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Make WordPress Core

Changeset 38352


Ignore:
Timestamp:
08/25/2016 05:36:22 PM (4 years ago)
Author:
wonderboymusic
Message:

Diff: move WP_Text_Diff_Renderer_inline (behold that lowercase "i") and WP_Text_Diff_Renderer_Table into their own files via svn cp.

See #37827.

Location:
trunk/src/wp-includes
Files:
1 edited
2 copied

Legend:

Unmodified
Added
Removed
  • trunk/src/wp-includes/class-wp-text-diff-renderer-inline.php

    r38350 r38352  
    11<?php
    22/**
    3  * WordPress Diff bastard child of old MediaWiki Diff Formatter.
    4  *
    5  * Basically all that remains is the table structure and some method names.
     3 * Diff API: WP_Text_Diff_Renderer_inline class
    64 *
    75 * @package WordPress
    86 * @subpackage Diff
     7 * @since 4.7.0
    98 */
    10 
    11 if ( ! class_exists( 'Text_Diff', false ) ) {
    12     /** Text_Diff class */
    13     require( dirname(__FILE__).'/Text/Diff.php' );
    14     /** Text_Diff_Renderer class */
    15     require( dirname(__FILE__).'/Text/Diff/Renderer.php' );
    16     /** Text_Diff_Renderer_inline class */
    17     require( dirname(__FILE__).'/Text/Diff/Renderer/inline.php' );
    18 }
    19 
    20 /**
    21  * Table renderer to display the diff lines.
    22  *
    23  * @since 2.6.0
    24  * @uses Text_Diff_Renderer Extends
    25  */
    26 class WP_Text_Diff_Renderer_Table extends Text_Diff_Renderer {
    27 
    28     /**
    29      * @see Text_Diff_Renderer::_leading_context_lines
    30      * @var int
    31      * @access public
    32      * @since 2.6.0
    33      */
    34     public $_leading_context_lines  = 10000;
    35 
    36     /**
    37      * @see Text_Diff_Renderer::_trailing_context_lines
    38      * @var int
    39      * @access public
    40      * @since 2.6.0
    41      */
    42     public $_trailing_context_lines = 10000;
    43 
    44     /**
    45      * Threshold for when a diff should be saved or omitted.
    46      *
    47      * @var float
    48      * @access protected
    49      * @since 2.6.0
    50      */
    51     protected $_diff_threshold = 0.6;
    52 
    53     /**
    54      * Inline display helper object name.
    55      *
    56      * @var string
    57      * @access protected
    58      * @since 2.6.0
    59      */
    60     protected $inline_diff_renderer = 'WP_Text_Diff_Renderer_inline';
    61 
    62     /**
    63      * Should we show the split view or not
    64      *
    65      * @var string
    66      * @access protected
    67      * @since 3.6.0
    68      */
    69     protected $_show_split_view = true;
    70 
    71     protected $compat_fields = array( '_show_split_view', 'inline_diff_renderer', '_diff_threshold' );
    72 
    73     /**
    74      * Constructor - Call parent constructor with params array.
    75      *
    76      * This will set class properties based on the key value pairs in the array.
    77      *
    78      * @since 2.6.0
    79      *
    80      * @param array $params
    81      */
    82     public function __construct( $params = array() ) {
    83         parent::__construct( $params );
    84         if ( isset( $params[ 'show_split_view' ] ) )
    85             $this->_show_split_view = $params[ 'show_split_view' ];
    86     }
    87 
    88     /**
    89      * @ignore
    90      *
    91      * @param string $header
    92      * @return string
    93      */
    94     public function _startBlock( $header ) {
    95         return '';
    96     }
    97 
    98     /**
    99      * @ignore
    100      *
    101      * @param array $lines
    102      * @param string $prefix
    103      */
    104     public function _lines( $lines, $prefix=' ' ) {
    105     }
    106 
    107     /**
    108      * @ignore
    109      *
    110      * @param string $line HTML-escape the value.
    111      * @return string
    112      */
    113     public function addedLine( $line ) {
    114         return "<td class='diff-addedline'>{$line}</td>";
    115 
    116     }
    117 
    118     /**
    119      * @ignore
    120      *
    121      * @param string $line HTML-escape the value.
    122      * @return string
    123      */
    124     public function deletedLine( $line ) {
    125         return "<td class='diff-deletedline'>{$line}</td>";
    126     }
    127 
    128     /**
    129      * @ignore
    130      *
    131      * @param string $line HTML-escape the value.
    132      * @return string
    133      */
    134     public function contextLine( $line ) {
    135         return "<td class='diff-context'>{$line}</td>";
    136     }
    137 
    138     /**
    139      * @ignore
    140      *
    141      * @return string
    142      */
    143     public function emptyLine() {
    144         return '<td>&nbsp;</td>';
    145     }
    146 
    147     /**
    148      * @ignore
    149      * @access public
    150      *
    151      * @param array $lines
    152      * @param bool $encode
    153      * @return string
    154      */
    155     public function _added( $lines, $encode = true ) {
    156         $r = '';
    157         foreach ($lines as $line) {
    158             if ( $encode ) {
    159                 $processed_line = htmlspecialchars( $line );
    160 
    161                 /**
    162                  * Contextually filters a diffed line.
    163                  *
    164                  * Filters TextDiff processing of diffed line. By default, diffs are processed with
    165                  * htmlspecialchars. Use this filter to remove or change the processing. Passes a context
    166                  * indicating if the line is added, deleted or unchanged.
    167                  *
    168                  * @since 4.1.0
    169                  *
    170                  * @param String $processed_line The processed diffed line.
    171                  * @param String $line           The unprocessed diffed line.
    172                  * @param string null            The line context. Values are 'added', 'deleted' or 'unchanged'.
    173                  */
    174                 $line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'added' );
    175             }
    176 
    177             if ( $this->_show_split_view ) {
    178                 $r .= '<tr>' . $this->emptyLine() . $this->emptyLine() . $this->addedLine( $line ) . "</tr>\n";
    179             } else {
    180                 $r .= '<tr>' . $this->addedLine( $line ) . "</tr>\n";
    181             }
    182         }
    183         return $r;
    184     }
    185 
    186     /**
    187      * @ignore
    188      * @access public
    189      *
    190      * @param array $lines
    191      * @param bool $encode
    192      * @return string
    193      */
    194     public function _deleted( $lines, $encode = true ) {
    195         $r = '';
    196         foreach ($lines as $line) {
    197             if ( $encode ) {
    198                 $processed_line = htmlspecialchars( $line );
    199 
    200                 /** This filter is documented in wp-includes/wp-diff.php */
    201                 $line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'deleted' );
    202             }
    203             if ( $this->_show_split_view ) {
    204                 $r .= '<tr>' . $this->deletedLine( $line ) . $this->emptyLine() . $this->emptyLine() . "</tr>\n";
    205             } else {
    206                 $r .= '<tr>' . $this->deletedLine( $line ) . "</tr>\n";
    207             }
    208 
    209         }
    210         return $r;
    211     }
    212 
    213     /**
    214      * @ignore
    215      * @access public
    216      *
    217      * @param array $lines
    218      * @param bool $encode
    219      * @return string
    220      */
    221     public function _context( $lines, $encode = true ) {
    222         $r = '';
    223         foreach ($lines as $line) {
    224             if ( $encode ) {
    225                 $processed_line = htmlspecialchars( $line );
    226 
    227                 /** This filter is documented in wp-includes/wp-diff.php */
    228                 $line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'unchanged' );
    229             }
    230             if (  $this->_show_split_view ) {
    231                 $r .= '<tr>' . $this->contextLine( $line ) . $this->emptyLine() . $this->contextLine( $line )  . "</tr>\n";
    232             } else {
    233                 $r .= '<tr>' . $this->contextLine( $line ) . "</tr>\n";
    234             }
    235         }
    236         return $r;
    237     }
    238 
    239     /**
    240      * Process changed lines to do word-by-word diffs for extra highlighting.
    241      *
    242      * (TRAC style) sometimes these lines can actually be deleted or added rows.
    243      * We do additional processing to figure that out
    244      *
    245      * @access public
    246      * @since 2.6.0
    247      *
    248      * @param array $orig
    249      * @param array $final
    250      * @return string
    251      */
    252     public function _changed( $orig, $final ) {
    253         $r = '';
    254 
    255         // Does the aforementioned additional processing
    256         // *_matches tell what rows are "the same" in orig and final. Those pairs will be diffed to get word changes
    257         //  match is numeric: an index in other column
    258         //  match is 'X': no match. It is a new row
    259         // *_rows are column vectors for the orig column and the final column.
    260         //  row >= 0: an indix of the $orig or $final array
    261         //  row  < 0: a blank row for that column
    262         list($orig_matches, $final_matches, $orig_rows, $final_rows) = $this->interleave_changed_lines( $orig, $final );
    263 
    264         // These will hold the word changes as determined by an inline diff
    265         $orig_diffs  = array();
    266         $final_diffs = array();
    267 
    268         // Compute word diffs for each matched pair using the inline diff
    269         foreach ( $orig_matches as $o => $f ) {
    270             if ( is_numeric($o) && is_numeric($f) ) {
    271                 $text_diff = new Text_Diff( 'auto', array( array($orig[$o]), array($final[$f]) ) );
    272                 $renderer = new $this->inline_diff_renderer;
    273                 $diff = $renderer->render( $text_diff );
    274 
    275                 // If they're too different, don't include any <ins> or <dels>
    276                 if ( preg_match_all( '!(<ins>.*?</ins>|<del>.*?</del>)!', $diff, $diff_matches ) ) {
    277                     // length of all text between <ins> or <del>
    278                     $stripped_matches = strlen(strip_tags( join(' ', $diff_matches[0]) ));
    279                     // since we count lengith of text between <ins> or <del> (instead of picking just one),
    280                     //  we double the length of chars not in those tags.
    281                     $stripped_diff = strlen(strip_tags( $diff )) * 2 - $stripped_matches;
    282                     $diff_ratio = $stripped_matches / $stripped_diff;
    283                     if ( $diff_ratio > $this->_diff_threshold )
    284                         continue; // Too different. Don't save diffs.
    285                 }
    286 
    287                 // Un-inline the diffs by removing del or ins
    288                 $orig_diffs[$o]  = preg_replace( '|<ins>.*?</ins>|', '', $diff );
    289                 $final_diffs[$f] = preg_replace( '|<del>.*?</del>|', '', $diff );
    290             }
    291         }
    292 
    293         foreach ( array_keys($orig_rows) as $row ) {
    294             // Both columns have blanks. Ignore them.
    295             if ( $orig_rows[$row] < 0 && $final_rows[$row] < 0 )
    296                 continue;
    297 
    298             // If we have a word based diff, use it. Otherwise, use the normal line.
    299             if ( isset( $orig_diffs[$orig_rows[$row]] ) )
    300                 $orig_line = $orig_diffs[$orig_rows[$row]];
    301             elseif ( isset( $orig[$orig_rows[$row]] ) )
    302                 $orig_line = htmlspecialchars($orig[$orig_rows[$row]]);
    303             else
    304                 $orig_line = '';
    305 
    306             if ( isset( $final_diffs[$final_rows[$row]] ) )
    307                 $final_line = $final_diffs[$final_rows[$row]];
    308             elseif ( isset( $final[$final_rows[$row]] ) )
    309                 $final_line = htmlspecialchars($final[$final_rows[$row]]);
    310             else
    311                 $final_line = '';
    312 
    313             if ( $orig_rows[$row] < 0 ) { // Orig is blank. This is really an added row.
    314                 $r .= $this->_added( array($final_line), false );
    315             } elseif ( $final_rows[$row] < 0 ) { // Final is blank. This is really a deleted row.
    316                 $r .= $this->_deleted( array($orig_line), false );
    317             } else { // A true changed row.
    318                 if ( $this->_show_split_view ) {
    319                     $r .= '<tr>' . $this->deletedLine( $orig_line ) . $this->emptyLine() . $this->addedLine( $final_line ) . "</tr>\n";
    320                 } else {
    321                     $r .= '<tr>' . $this->deletedLine( $orig_line ) . "</tr><tr>" . $this->addedLine( $final_line ) . "</tr>\n";
    322                 }
    323             }
    324         }
    325 
    326         return $r;
    327     }
    328 
    329     /**
    330      * Takes changed blocks and matches which rows in orig turned into which rows in final.
    331      *
    332      * Returns
    333      *  *_matches ( which rows match with which )
    334      *  *_rows ( order of rows in each column interleaved with blank rows as
    335      *      necessary )
    336      *
    337      * @since 2.6.0
    338      *
    339      * @param array $orig
    340      * @param array $final
    341      * @return array
    342      */
    343     public function interleave_changed_lines( $orig, $final ) {
    344 
    345         // Contains all pairwise string comparisons. Keys are such that this need only be a one dimensional array.
    346         $matches = array();
    347         foreach ( array_keys($orig) as $o ) {
    348             foreach ( array_keys($final) as $f ) {
    349                 $matches["$o,$f"] = $this->compute_string_distance( $orig[$o], $final[$f] );
    350             }
    351         }
    352         asort($matches); // Order by string distance.
    353 
    354         $orig_matches  = array();
    355         $final_matches = array();
    356 
    357         foreach ( $matches as $keys => $difference ) {
    358             list($o, $f) = explode(',', $keys);
    359             $o = (int) $o;
    360             $f = (int) $f;
    361 
    362             // Already have better matches for these guys
    363             if ( isset($orig_matches[$o]) && isset($final_matches[$f]) )
    364                 continue;
    365 
    366             // First match for these guys. Must be best match
    367             if ( !isset($orig_matches[$o]) && !isset($final_matches[$f]) ) {
    368                 $orig_matches[$o] = $f;
    369                 $final_matches[$f] = $o;
    370                 continue;
    371             }
    372 
    373             // Best match of this final is already taken?  Must mean this final is a new row.
    374             if ( isset($orig_matches[$o]) )
    375                 $final_matches[$f] = 'x';
    376 
    377             // Best match of this orig is already taken?  Must mean this orig is a deleted row.
    378             elseif ( isset($final_matches[$f]) )
    379                 $orig_matches[$o] = 'x';
    380         }
    381 
    382         // We read the text in this order
    383         ksort($orig_matches);
    384         ksort($final_matches);
    385 
    386         // Stores rows and blanks for each column.
    387         $orig_rows = $orig_rows_copy = array_keys($orig_matches);
    388         $final_rows = array_keys($final_matches);
    389 
    390         // Interleaves rows with blanks to keep matches aligned.
    391         // We may end up with some extraneous blank rows, but we'll just ignore them later.
    392         foreach ( $orig_rows_copy as $orig_row ) {
    393             $final_pos = array_search($orig_matches[$orig_row], $final_rows, true);
    394             $orig_pos = (int) array_search($orig_row, $orig_rows, true);
    395 
    396             if ( false === $final_pos ) { // This orig is paired with a blank final.
    397                 array_splice( $final_rows, $orig_pos, 0, -1 );
    398             } elseif ( $final_pos < $orig_pos ) { // This orig's match is up a ways. Pad final with blank rows.
    399                 $diff_pos = $final_pos - $orig_pos;
    400                 while ( $diff_pos < 0 )
    401                     array_splice( $final_rows, $orig_pos, 0, $diff_pos++ );
    402             } elseif ( $final_pos > $orig_pos ) { // This orig's match is down a ways. Pad orig with blank rows.
    403                 $diff_pos = $orig_pos - $final_pos;
    404                 while ( $diff_pos < 0 )
    405                     array_splice( $orig_rows, $orig_pos, 0, $diff_pos++ );
    406             }
    407         }
    408 
    409         // Pad the ends with blank rows if the columns aren't the same length
    410         $diff_count = count($orig_rows) - count($final_rows);
    411         if ( $diff_count < 0 ) {
    412             while ( $diff_count < 0 )
    413                 array_push($orig_rows, $diff_count++);
    414         } elseif ( $diff_count > 0 ) {
    415             $diff_count = -1 * $diff_count;
    416             while ( $diff_count < 0 )
    417                 array_push($final_rows, $diff_count++);
    418         }
    419 
    420         return array($orig_matches, $final_matches, $orig_rows, $final_rows);
    421     }
    422 
    423     /**
    424      * Computes a number that is intended to reflect the "distance" between two strings.
    425      *
    426      * @since 2.6.0
    427      *
    428      * @param string $string1
    429      * @param string $string2
    430      * @return int
    431      */
    432     public function compute_string_distance( $string1, $string2 ) {
    433         // Vectors containing character frequency for all chars in each string
    434         $chars1 = count_chars($string1);
    435         $chars2 = count_chars($string2);
    436 
    437         // L1-norm of difference vector.
    438         $difference = array_sum( array_map( array($this, 'difference'), $chars1, $chars2 ) );
    439 
    440         // $string1 has zero length? Odd. Give huge penalty by not dividing.
    441         if ( !$string1 )
    442             return $difference;
    443 
    444         // Return distance per character (of string1).
    445         return $difference / strlen($string1);
    446     }
    447 
    448     /**
    449      * @ignore
    450      * @since 2.6.0
    451      *
    452      * @param int $a
    453      * @param int $b
    454      * @return int
    455      */
    456     public function difference( $a, $b ) {
    457         return abs( $a - $b );
    458     }
    459 
    460     /**
    461      * Make private properties readable for backward compatibility.
    462      *
    463      * @since 4.0.0
    464      * @access public
    465      *
    466      * @param string $name Property to get.
    467      * @return mixed Property.
    468      */
    469     public function __get( $name ) {
    470         if ( in_array( $name, $this->compat_fields ) ) {
    471             return $this->$name;
    472         }
    473     }
    474 
    475     /**
    476      * Make private properties settable for backward compatibility.
    477      *
    478      * @since 4.0.0
    479      * @access public
    480      *
    481      * @param string $name  Property to check if set.
    482      * @param mixed  $value Property value.
    483      * @return mixed Newly-set property.
    484      */
    485     public function __set( $name, $value ) {
    486         if ( in_array( $name, $this->compat_fields ) ) {
    487             return $this->$name = $value;
    488         }
    489     }
    490 
    491     /**
    492      * Make private properties checkable for backward compatibility.
    493      *
    494      * @since 4.0.0
    495      * @access public
    496      *
    497      * @param string $name Property to check if set.
    498      * @return bool Whether the property is set.
    499      */
    500     public function __isset( $name ) {
    501         if ( in_array( $name, $this->compat_fields ) ) {
    502             return isset( $this->$name );
    503         }
    504     }
    505 
    506     /**
    507      * Make private properties un-settable for backward compatibility.
    508      *
    509      * @since 4.0.0
    510      * @access public
    511      *
    512      * @param string $name Property to unset.
    513      */
    514     public function __unset( $name ) {
    515         if ( in_array( $name, $this->compat_fields ) ) {
    516             unset( $this->$name );
    517         }
    518     }
    519 }
    5209
    52110/**
  • trunk/src/wp-includes/class-wp-text-diff-renderer-table.php

    r38350 r38352  
    11<?php
    22/**
    3  * WordPress Diff bastard child of old MediaWiki Diff Formatter.
    4  *
    5  * Basically all that remains is the table structure and some method names.
     3 * Diff API: WP_Text_Diff_Renderer_Table class
    64 *
    75 * @package WordPress
    86 * @subpackage Diff
     7 * @since 4.7.0
    98 */
    10 
    11 if ( ! class_exists( 'Text_Diff', false ) ) {
    12     /** Text_Diff class */
    13     require( dirname(__FILE__).'/Text/Diff.php' );
    14     /** Text_Diff_Renderer class */
    15     require( dirname(__FILE__).'/Text/Diff/Renderer.php' );
    16     /** Text_Diff_Renderer_inline class */
    17     require( dirname(__FILE__).'/Text/Diff/Renderer/inline.php' );
    18 }
    199
    2010/**
     
    518508    }
    519509}
    520 
    521 /**
    522  * Better word splitting than the PEAR package provides.
    523  *
    524  * @since 2.6.0
    525  * @uses Text_Diff_Renderer_inline Extends
    526  */
    527 class WP_Text_Diff_Renderer_inline extends Text_Diff_Renderer_inline {
    528 
    529     /**
    530      * @ignore
    531      * @since 2.6.0
    532      *
    533      * @param string $string
    534      * @param string $newlineEscape
    535      * @return string
    536      */
    537     public function _splitOnWords($string, $newlineEscape = "\n") {
    538         $string = str_replace("\0", '', $string);
    539         $words  = preg_split( '/([^\w])/u', $string, -1, PREG_SPLIT_DELIM_CAPTURE );
    540         $words  = str_replace( "\n", $newlineEscape, $words );
    541         return $words;
    542     }
    543 
    544 }
  • trunk/src/wp-includes/wp-diff.php

    r37544 r38352  
    1111if ( ! class_exists( 'Text_Diff', false ) ) {
    1212    /** Text_Diff class */
    13     require( dirname(__FILE__).'/Text/Diff.php' );
     13    require( ABSPATH . WPINC . '/Text/Diff.php' );
    1414    /** Text_Diff_Renderer class */
    15     require( dirname(__FILE__).'/Text/Diff/Renderer.php' );
     15    require( ABSPATH . WPINC . '/Text/Diff/Renderer.php' );
    1616    /** Text_Diff_Renderer_inline class */
    17     require( dirname(__FILE__).'/Text/Diff/Renderer/inline.php' );
     17    require( ABSPATH . WPINC . '/Text/Diff/Renderer/inline.php' );
    1818}
    1919
    20 /**
    21  * Table renderer to display the diff lines.
    22  *
    23  * @since 2.6.0
    24  * @uses Text_Diff_Renderer Extends
    25  */
    26 class WP_Text_Diff_Renderer_Table extends Text_Diff_Renderer {
    27 
    28     /**
    29      * @see Text_Diff_Renderer::_leading_context_lines
    30      * @var int
    31      * @access public
    32      * @since 2.6.0
    33      */
    34     public $_leading_context_lines  = 10000;
    35 
    36     /**
    37      * @see Text_Diff_Renderer::_trailing_context_lines
    38      * @var int
    39      * @access public
    40      * @since 2.6.0
    41      */
    42     public $_trailing_context_lines = 10000;
    43 
    44     /**
    45      * Threshold for when a diff should be saved or omitted.
    46      *
    47      * @var float
    48      * @access protected
    49      * @since 2.6.0
    50      */
    51     protected $_diff_threshold = 0.6;
    52 
    53     /**
    54      * Inline display helper object name.
    55      *
    56      * @var string
    57      * @access protected
    58      * @since 2.6.0
    59      */
    60     protected $inline_diff_renderer = 'WP_Text_Diff_Renderer_inline';
    61 
    62     /**
    63      * Should we show the split view or not
    64      *
    65      * @var string
    66      * @access protected
    67      * @since 3.6.0
    68      */
    69     protected $_show_split_view = true;
    70 
    71     protected $compat_fields = array( '_show_split_view', 'inline_diff_renderer', '_diff_threshold' );
    72 
    73     /**
    74      * Constructor - Call parent constructor with params array.
    75      *
    76      * This will set class properties based on the key value pairs in the array.
    77      *
    78      * @since 2.6.0
    79      *
    80      * @param array $params
    81      */
    82     public function __construct( $params = array() ) {
    83         parent::__construct( $params );
    84         if ( isset( $params[ 'show_split_view' ] ) )
    85             $this->_show_split_view = $params[ 'show_split_view' ];
    86     }
    87 
    88     /**
    89      * @ignore
    90      *
    91      * @param string $header
    92      * @return string
    93      */
    94     public function _startBlock( $header ) {
    95         return '';
    96     }
    97 
    98     /**
    99      * @ignore
    100      *
    101      * @param array $lines
    102      * @param string $prefix
    103      */
    104     public function _lines( $lines, $prefix=' ' ) {
    105     }
    106 
    107     /**
    108      * @ignore
    109      *
    110      * @param string $line HTML-escape the value.
    111      * @return string
    112      */
    113     public function addedLine( $line ) {
    114         return "<td class='diff-addedline'>{$line}</td>";
    115 
    116     }
    117 
    118     /**
    119      * @ignore
    120      *
    121      * @param string $line HTML-escape the value.
    122      * @return string
    123      */
    124     public function deletedLine( $line ) {
    125         return "<td class='diff-deletedline'>{$line}</td>";
    126     }
    127 
    128     /**
    129      * @ignore
    130      *
    131      * @param string $line HTML-escape the value.
    132      * @return string
    133      */
    134     public function contextLine( $line ) {
    135         return "<td class='diff-context'>{$line}</td>";
    136     }
    137 
    138     /**
    139      * @ignore
    140      *
    141      * @return string
    142      */
    143     public function emptyLine() {
    144         return '<td>&nbsp;</td>';
    145     }
    146 
    147     /**
    148      * @ignore
    149      * @access public
    150      *
    151      * @param array $lines
    152      * @param bool $encode
    153      * @return string
    154      */
    155     public function _added( $lines, $encode = true ) {
    156         $r = '';
    157         foreach ($lines as $line) {
    158             if ( $encode ) {
    159                 $processed_line = htmlspecialchars( $line );
    160 
    161                 /**
    162                  * Contextually filters a diffed line.
    163                  *
    164                  * Filters TextDiff processing of diffed line. By default, diffs are processed with
    165                  * htmlspecialchars. Use this filter to remove or change the processing. Passes a context
    166                  * indicating if the line is added, deleted or unchanged.
    167                  *
    168                  * @since 4.1.0
    169                  *
    170                  * @param String $processed_line The processed diffed line.
    171                  * @param String $line           The unprocessed diffed line.
    172                  * @param string null            The line context. Values are 'added', 'deleted' or 'unchanged'.
    173                  */
    174                 $line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'added' );
    175             }
    176 
    177             if ( $this->_show_split_view ) {
    178                 $r .= '<tr>' . $this->emptyLine() . $this->emptyLine() . $this->addedLine( $line ) . "</tr>\n";
    179             } else {
    180                 $r .= '<tr>' . $this->addedLine( $line ) . "</tr>\n";
    181             }
    182         }
    183         return $r;
    184     }
    185 
    186     /**
    187      * @ignore
    188      * @access public
    189      *
    190      * @param array $lines
    191      * @param bool $encode
    192      * @return string
    193      */
    194     public function _deleted( $lines, $encode = true ) {
    195         $r = '';
    196         foreach ($lines as $line) {
    197             if ( $encode ) {
    198                 $processed_line = htmlspecialchars( $line );
    199 
    200                 /** This filter is documented in wp-includes/wp-diff.php */
    201                 $line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'deleted' );
    202             }
    203             if ( $this->_show_split_view ) {
    204                 $r .= '<tr>' . $this->deletedLine( $line ) . $this->emptyLine() . $this->emptyLine() . "</tr>\n";
    205             } else {
    206                 $r .= '<tr>' . $this->deletedLine( $line ) . "</tr>\n";
    207             }
    208 
    209         }
    210         return $r;
    211     }
    212 
    213     /**
    214      * @ignore
    215      * @access public
    216      *
    217      * @param array $lines
    218      * @param bool $encode
    219      * @return string
    220      */
    221     public function _context( $lines, $encode = true ) {
    222         $r = '';
    223         foreach ($lines as $line) {
    224             if ( $encode ) {
    225                 $processed_line = htmlspecialchars( $line );
    226 
    227                 /** This filter is documented in wp-includes/wp-diff.php */
    228                 $line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'unchanged' );
    229             }
    230             if (  $this->_show_split_view ) {
    231                 $r .= '<tr>' . $this->contextLine( $line ) . $this->emptyLine() . $this->contextLine( $line )  . "</tr>\n";
    232             } else {
    233                 $r .= '<tr>' . $this->contextLine( $line ) . "</tr>\n";
    234             }
    235         }
    236         return $r;
    237     }
    238 
    239     /**
    240      * Process changed lines to do word-by-word diffs for extra highlighting.
    241      *
    242      * (TRAC style) sometimes these lines can actually be deleted or added rows.
    243      * We do additional processing to figure that out
    244      *
    245      * @access public
    246      * @since 2.6.0
    247      *
    248      * @param array $orig
    249      * @param array $final
    250      * @return string
    251      */
    252     public function _changed( $orig, $final ) {
    253         $r = '';
    254 
    255         // Does the aforementioned additional processing
    256         // *_matches tell what rows are "the same" in orig and final. Those pairs will be diffed to get word changes
    257         //  match is numeric: an index in other column
    258         //  match is 'X': no match. It is a new row
    259         // *_rows are column vectors for the orig column and the final column.
    260         //  row >= 0: an indix of the $orig or $final array
    261         //  row  < 0: a blank row for that column
    262         list($orig_matches, $final_matches, $orig_rows, $final_rows) = $this->interleave_changed_lines( $orig, $final );
    263 
    264         // These will hold the word changes as determined by an inline diff
    265         $orig_diffs  = array();
    266         $final_diffs = array();
    267 
    268         // Compute word diffs for each matched pair using the inline diff
    269         foreach ( $orig_matches as $o => $f ) {
    270             if ( is_numeric($o) && is_numeric($f) ) {
    271                 $text_diff = new Text_Diff( 'auto', array( array($orig[$o]), array($final[$f]) ) );
    272                 $renderer = new $this->inline_diff_renderer;
    273                 $diff = $renderer->render( $text_diff );
    274 
    275                 // If they're too different, don't include any <ins> or <dels>
    276                 if ( preg_match_all( '!(<ins>.*?</ins>|<del>.*?</del>)!', $diff, $diff_matches ) ) {
    277                     // length of all text between <ins> or <del>
    278                     $stripped_matches = strlen(strip_tags( join(' ', $diff_matches[0]) ));
    279                     // since we count lengith of text between <ins> or <del> (instead of picking just one),
    280                     //  we double the length of chars not in those tags.
    281                     $stripped_diff = strlen(strip_tags( $diff )) * 2 - $stripped_matches;
    282                     $diff_ratio = $stripped_matches / $stripped_diff;
    283                     if ( $diff_ratio > $this->_diff_threshold )
    284                         continue; // Too different. Don't save diffs.
    285                 }
    286 
    287                 // Un-inline the diffs by removing del or ins
    288                 $orig_diffs[$o]  = preg_replace( '|<ins>.*?</ins>|', '', $diff );
    289                 $final_diffs[$f] = preg_replace( '|<del>.*?</del>|', '', $diff );
    290             }
    291         }
    292 
    293         foreach ( array_keys($orig_rows) as $row ) {
    294             // Both columns have blanks. Ignore them.
    295             if ( $orig_rows[$row] < 0 && $final_rows[$row] < 0 )
    296                 continue;
    297 
    298             // If we have a word based diff, use it. Otherwise, use the normal line.
    299             if ( isset( $orig_diffs[$orig_rows[$row]] ) )
    300                 $orig_line = $orig_diffs[$orig_rows[$row]];
    301             elseif ( isset( $orig[$orig_rows[$row]] ) )
    302                 $orig_line = htmlspecialchars($orig[$orig_rows[$row]]);
    303             else
    304                 $orig_line = '';
    305 
    306             if ( isset( $final_diffs[$final_rows[$row]] ) )
    307                 $final_line = $final_diffs[$final_rows[$row]];
    308             elseif ( isset( $final[$final_rows[$row]] ) )
    309                 $final_line = htmlspecialchars($final[$final_rows[$row]]);
    310             else
    311                 $final_line = '';
    312 
    313             if ( $orig_rows[$row] < 0 ) { // Orig is blank. This is really an added row.
    314                 $r .= $this->_added( array($final_line), false );
    315             } elseif ( $final_rows[$row] < 0 ) { // Final is blank. This is really a deleted row.
    316                 $r .= $this->_deleted( array($orig_line), false );
    317             } else { // A true changed row.
    318                 if ( $this->_show_split_view ) {
    319                     $r .= '<tr>' . $this->deletedLine( $orig_line ) . $this->emptyLine() . $this->addedLine( $final_line ) . "</tr>\n";
    320                 } else {
    321                     $r .= '<tr>' . $this->deletedLine( $orig_line ) . "</tr><tr>" . $this->addedLine( $final_line ) . "</tr>\n";
    322                 }
    323             }
    324         }
    325 
    326         return $r;
    327     }
    328 
    329     /**
    330      * Takes changed blocks and matches which rows in orig turned into which rows in final.
    331      *
    332      * Returns
    333      *  *_matches ( which rows match with which )
    334      *  *_rows ( order of rows in each column interleaved with blank rows as
    335      *      necessary )
    336      *
    337      * @since 2.6.0
    338      *
    339      * @param array $orig
    340      * @param array $final
    341      * @return array
    342      */
    343     public function interleave_changed_lines( $orig, $final ) {
    344 
    345         // Contains all pairwise string comparisons. Keys are such that this need only be a one dimensional array.
    346         $matches = array();
    347         foreach ( array_keys($orig) as $o ) {
    348             foreach ( array_keys($final) as $f ) {
    349                 $matches["$o,$f"] = $this->compute_string_distance( $orig[$o], $final[$f] );
    350             }
    351         }
    352         asort($matches); // Order by string distance.
    353 
    354         $orig_matches  = array();
    355         $final_matches = array();
    356 
    357         foreach ( $matches as $keys => $difference ) {
    358             list($o, $f) = explode(',', $keys);
    359             $o = (int) $o;
    360             $f = (int) $f;
    361 
    362             // Already have better matches for these guys
    363             if ( isset($orig_matches[$o]) && isset($final_matches[$f]) )
    364                 continue;
    365 
    366             // First match for these guys. Must be best match
    367             if ( !isset($orig_matches[$o]) && !isset($final_matches[$f]) ) {
    368                 $orig_matches[$o] = $f;
    369                 $final_matches[$f] = $o;
    370                 continue;
    371             }
    372 
    373             // Best match of this final is already taken?  Must mean this final is a new row.
    374             if ( isset($orig_matches[$o]) )
    375                 $final_matches[$f] = 'x';
    376 
    377             // Best match of this orig is already taken?  Must mean this orig is a deleted row.
    378             elseif ( isset($final_matches[$f]) )
    379                 $orig_matches[$o] = 'x';
    380         }
    381 
    382         // We read the text in this order
    383         ksort($orig_matches);
    384         ksort($final_matches);
    385 
    386         // Stores rows and blanks for each column.
    387         $orig_rows = $orig_rows_copy = array_keys($orig_matches);
    388         $final_rows = array_keys($final_matches);
    389 
    390         // Interleaves rows with blanks to keep matches aligned.
    391         // We may end up with some extraneous blank rows, but we'll just ignore them later.
    392         foreach ( $orig_rows_copy as $orig_row ) {
    393             $final_pos = array_search($orig_matches[$orig_row], $final_rows, true);
    394             $orig_pos = (int) array_search($orig_row, $orig_rows, true);
    395 
    396             if ( false === $final_pos ) { // This orig is paired with a blank final.
    397                 array_splice( $final_rows, $orig_pos, 0, -1 );
    398             } elseif ( $final_pos < $orig_pos ) { // This orig's match is up a ways. Pad final with blank rows.
    399                 $diff_pos = $final_pos - $orig_pos;
    400                 while ( $diff_pos < 0 )
    401                     array_splice( $final_rows, $orig_pos, 0, $diff_pos++ );
    402             } elseif ( $final_pos > $orig_pos ) { // This orig's match is down a ways. Pad orig with blank rows.
    403                 $diff_pos = $orig_pos - $final_pos;
    404                 while ( $diff_pos < 0 )
    405                     array_splice( $orig_rows, $orig_pos, 0, $diff_pos++ );
    406             }
    407         }
    408 
    409         // Pad the ends with blank rows if the columns aren't the same length
    410         $diff_count = count($orig_rows) - count($final_rows);
    411         if ( $diff_count < 0 ) {
    412             while ( $diff_count < 0 )
    413                 array_push($orig_rows, $diff_count++);
    414         } elseif ( $diff_count > 0 ) {
    415             $diff_count = -1 * $diff_count;
    416             while ( $diff_count < 0 )
    417                 array_push($final_rows, $diff_count++);
    418         }
    419 
    420         return array($orig_matches, $final_matches, $orig_rows, $final_rows);
    421     }
    422 
    423     /**
    424      * Computes a number that is intended to reflect the "distance" between two strings.
    425      *
    426      * @since 2.6.0
    427      *
    428      * @param string $string1
    429      * @param string $string2
    430      * @return int
    431      */
    432     public function compute_string_distance( $string1, $string2 ) {
    433         // Vectors containing character frequency for all chars in each string
    434         $chars1 = count_chars($string1);
    435         $chars2 = count_chars($string2);
    436 
    437         // L1-norm of difference vector.
    438         $difference = array_sum( array_map( array($this, 'difference'), $chars1, $chars2 ) );
    439 
    440         // $string1 has zero length? Odd. Give huge penalty by not dividing.
    441         if ( !$string1 )
    442             return $difference;
    443 
    444         // Return distance per character (of string1).
    445         return $difference / strlen($string1);
    446     }
    447 
    448     /**
    449      * @ignore
    450      * @since 2.6.0
    451      *
    452      * @param int $a
    453      * @param int $b
    454      * @return int
    455      */
    456     public function difference( $a, $b ) {
    457         return abs( $a - $b );
    458     }
    459 
    460     /**
    461      * Make private properties readable for backward compatibility.
    462      *
    463      * @since 4.0.0
    464      * @access public
    465      *
    466      * @param string $name Property to get.
    467      * @return mixed Property.
    468      */
    469     public function __get( $name ) {
    470         if ( in_array( $name, $this->compat_fields ) ) {
    471             return $this->$name;
    472         }
    473     }
    474 
    475     /**
    476      * Make private properties settable for backward compatibility.
    477      *
    478      * @since 4.0.0
    479      * @access public
    480      *
    481      * @param string $name  Property to check if set.
    482      * @param mixed  $value Property value.
    483      * @return mixed Newly-set property.
    484      */
    485     public function __set( $name, $value ) {
    486         if ( in_array( $name, $this->compat_fields ) ) {
    487             return $this->$name = $value;
    488         }
    489     }
    490 
    491     /**
    492      * Make private properties checkable for backward compatibility.
    493      *
    494      * @since 4.0.0
    495      * @access public
    496      *
    497      * @param string $name Property to check if set.
    498      * @return bool Whether the property is set.
    499      */
    500     public function __isset( $name ) {
    501         if ( in_array( $name, $this->compat_fields ) ) {
    502             return isset( $this->$name );
    503         }
    504     }
    505 
    506     /**
    507      * Make private properties un-settable for backward compatibility.
    508      *
    509      * @since 4.0.0
    510      * @access public
    511      *
    512      * @param string $name Property to unset.
    513      */
    514     public function __unset( $name ) {
    515         if ( in_array( $name, $this->compat_fields ) ) {
    516             unset( $this->$name );
    517         }
    518     }
    519 }
    520 
    521 /**
    522  * Better word splitting than the PEAR package provides.
    523  *
    524  * @since 2.6.0
    525  * @uses Text_Diff_Renderer_inline Extends
    526  */
    527 class WP_Text_Diff_Renderer_inline extends Text_Diff_Renderer_inline {
    528 
    529     /**
    530      * @ignore
    531      * @since 2.6.0
    532      *
    533      * @param string $string
    534      * @param string $newlineEscape
    535      * @return string
    536      */
    537     public function _splitOnWords($string, $newlineEscape = "\n") {
    538         $string = str_replace("\0", '', $string);
    539         $words  = preg_split( '/([^\w])/u', $string, -1, PREG_SPLIT_DELIM_CAPTURE );
    540         $words  = str_replace( "\n", $newlineEscape, $words );
    541         return $words;
    542     }
    543 
    544 }
     20require( ABSPATH . WPINC . '/class-wp-text-diff-renderer-table.php' );
     21require( ABSPATH . WPINC . '/class-wp-text-diff-renderer-inline.php' );
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